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-No.4o2.57s. Patented May 7, 1889.

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y fUNITED STATES. PATENT OFFICE.

CHARLES A. DUREN, OF BOSTON, MASSACHUSETTS, AND RICHARD M. SMITH7 OF PROVIDENCE, RHODE ISLAND.

CENTER-BOARD.

SPECIFICATION forming part of Letters `Patent No. 402,573, dated May '7, 1889.

Application filed January l1, 1889. Serial No. 295,932. (No model.)

To @ZZ whom it may concern:

Be it known that we, CHARLES A. DUREN, of Boston, in the county of Suffolk, State of Massachusetts, and RICHARD M. SMITH, of Providence, in the county of Providence, State of Rhode Island, have invented a certain new and useful Improvement in Center-Boards, of which the following is a descrip tion sufficiently full, clear, and exact to enable any person skilled in the art 'or science to which said invention appertains to make 'and use the same,

reference being had to the accompanying drawings, forming part of this specification, in whichf Figure l is a side elevation of a boat provided with our improvement, the hull being shown as broken away to show the centerboard; Fig. 2, a vertical longitudinal section of the center-board box, showing the board as partially lowered, and Fig. 3 an end elevation illustrating certain details of construction.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

Our invention relates particularly to that class of center-boards which are especially adapted for use with yachts and boats of light draft; and it consists in certain novel features, as hereinafter fullyset forth and claimed, the object being to produce a simple, cheap, and more effective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood` by all conversant with such matters from the following explanation Y In the drawings, A represents the hull of the boat, 4B the center-board, and C the box. The box C is of the ordinary form and construction, excepting as hereinafterspecied,

.and is disposed centrally in the hull A in the usual. manner. A longitudinally-arranged iron strap, b, is bolted to the upper portion of one end of the board B, and pivoted at f in lugs on said strap is one leaf, CZ, of an ordinary strap-hinge. The opposite leaf, g, ofA said hinge is disposed vertically and loosely behind a 'laterally-arranged pin, h, secured in the sides of the board-box at the rear of its forward stanchion, t'. The lower end of the hinge-leaf g rests upon a hook, k, secured near the bottom of said stanchion. The knuckle of the hinge is provided with a lip, m, which rests upon a shoulder, p, formed in the stanchion i, as shown in the detail view in Fig. 3. A vertically-arranged stoppingplate, t, is detachably secured to the rear face of the stanchion t' by means of set-screws o, or in any other suitable manner, the lower end of said plate resting on the lip m of the hinge-knuckle and clamping ithto the shoulder p, thereby preventing the hinge-leaf g from becoming accidentally displaced from behind the pin h by the action of the water on the center-board when lowered.

Two lines or ropes, x xo', are secured in eyes y on the upper edge of the board B and pass through openings ,z in the cap w of the box C, said cap being detachablysecured to the boxstanchions by screws 15.

IVhen constructed of wood, the board B may be weighted with iron or lead on its lower edge, as shown at 25 in Fig. 2,l if desired.

In the use of our improvement, by releasing the lines a: x the board will fall of its own weight, and by determining the distance said lines are lowered, may readily be suspended in a horizontal position, as at'35, below the keel of the boat. By lowering the lines w and uniformly the center-board may be submerged for its entire length, and by lowering one of said lines below its companion line either corner of the center-board maybe lowered, and thus aid materially in sailing the boat.

The center-board box ordinarily projects into the cabin of the boat, and to obtain sufficient depth of board it is necessary to construct the box of such height above the cabiniioor that it cannot be utilized for other purposes.

In our improvement the box may be constructed much shorter, and by attaching leaves to the cap w thereof be made to'serve as a iiat table. Y

When it becomes necessary to unship the center-board, the cap w and stop-plate z5 are removed and the leaf g of the hinge withdrawn from behind the pin 72, when the board can readily be raised from' out the box.

IOO

Having thus explained oni` invention, what We claim is*- l. The combination of a center-board box, :i center-board adapted to Slide vertically therein, a hinge movable vertically in said box, a support for one leaf of seid hinge, the other leaf thereof being pivotzilly Connected to one of the upper coi-ners of said centerboend, and two Suspension-lines connected to said' Center-board nein1 opposite ends thereof.

2. In e boat, the combination oi' n centerboaid box, e hinge having one leaf loosely clisposed between aguard-pin and one of the boxstanehions, n. lip on the knuckle of said hinge resting on e shoulder in said stanehion, e stopplate engaging Said lip, and n Center-board pivoted by one end to the free leaf of said hinge, substantially ne described.

3. In L boat, the combina-tion of a centerbomd box provided with n detachable cap, :t board fitted to slide vertically in seid box, n hinge letaehnbly Seemed by one leaf to :t boxstanehion, straps on said board having lugs by which it is pivoted to the free leaf of said hinge, a lip on the hinge resting on n shoulder in said stanehion, a detachable stop-plate on the stanehion engaging said lip, and ropes secured to said board and working in openings in Said cap, substantially as described.

4. ln a boat, the combination of the box C, the board B, fitted to slide therein, a hinge having the leaf g, resting on e hook, 7c, and disposed between n pin, 71., and a sienehion, 1T, of said box, the free leaf l of said hinge being p'ivoted to Said board, the lip m on the hinge knuckle and resting on a shoulder, p, of seid stanehion, the detachable plate i, engaging said hinge, and the lines a," for manipulating said board, substantially as described.

CHARLES A. DUREN. RICHARD M. SMITH. litnessesz ALBERT R. COOKE, O. M'. SHAW. 

